Found this site for sizing up tires and wheels - if you're struggling just like me. It even tells you at the bottom of the page the change in your stance (ie, if you will clear, how much more you will stick out, etc...).

Pretty Awesome.
(sometimes takes a while to load, and I'm on broadband)

http://www.rims-n-tires.com/rt_specs...xt2=33x12.5x16

 

WOW! Thats a good find. I kept it as my favorites because this one has been asked about a 1000 times.

 

excellent find, many thanks